Pope Liberius

Pope Liberius (305-24 September 366) was Pope from 352 to 366, succeeding Pope Julius I and preceding Pope Damasus I.

Biography
Liberius was born in 305 AD in Rome, and he was consecrated in 352 as the new pope after Pope Julius I's death. Liberius combatted Arianism, a rival heretic group of Christians, during his reign. He died on 24 September 366, the first pope that was not a saint in Roman Martyrology; he was the earliest pontiff not to be canonized.